His passing yards were 23rd just below the NFL MVP. His touchdowns were 23rd, much higher if you track total touchdowns.
He is a 2nd year quarterback who is 15-12 as a starter, and took the team to the playoffs last year. Without his wheels they probably dont get there.
On the QBR, which I think is a total farce, if you think Jacoby Brissett, Daniel Jones, Jameis Winston, Kyler Murray, Derek Carr, Ryan Fitzpatrick, and Ryan Tannehill are all better QBs than Josh Allen go ahead, but you'd be wrong.
If you want to look at stats to justify a Quarterback being good or not fine, but dont forget the player's entire game. Is Josh one of the best passers in the league right now, probably not. However, he is one of the top 15 players at his position, and he is pushing for top 10.